When you have any questions hard to answ
题型:选择题
问题:
When you have any questions hard to answer, you may ________ your notes.[ ]
A. turn on
B. come to
C. refer to
D. look up
When you have any questions hard to answer, you may ________ your notes.[ ]
A. turn on
B. come to
C. refer to
D. look up